Scraper



F. c. M lNTlRE SCRAFER Filed Nov. 8 1926 HY V EN TOR. 1 76'. M911: are

A TTORNE Y ZVW WAASI;

Patented May 15, 1928.

UNITED STATES FRANK G, MCINTIRE, STOCKTON, CALIFORNIA.

SGRALPEB.

Application filed November 8, 1926. Serial No. 146,945.

This invention relates to improvements in earth scraping and transporting devices, my principal object being to provide an apparatus for the purpose so constructed that dirt as scraped up is immediately transferred to a wheel supported bowl. The advantages of this arrangement are great. It is generally recognized that the greatest .obstacle to scraping and transporting large loads is the resistance of the dirt to piling up and being dragged along the ground, so that ever increasing draft power is necessary to scrape and drag along a gradually increasing mass of dirt. Once a large body of dirt however is placed in a wheel supported receptacle, the hauling of the receptacle and its load becomes a very easy matter requiring relatively little power.

With my improved apparatus the above ideal conditions are obtained and only a very small body of scraped dirt remains in dragging relation with the ground at any time. The scraper may therefore be made in any size practicable to carry a correspondingly large mass of dirt without having to consider the limitations imposed by available power or other draft means, as must now be done when designing scrapers of ordinary construction. I

A further object of the invention is to pro duce a simple and inexpensive device and yet one which will be exceedingly effective for thepurpose for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings similar characters of ref erence indicate corresponding parts in the several views:

Fig. 1 is a sectional elevation of my improved scraper.

Fig. 2 is a sectional plan of the same.

Fig. 3 is a detailed section taken on the line 3-3 of Fig. 2 to show the bowl upsetting trip structure.

Fig. 4 is a top plan detail of a holding means for the scraper blade raising lever.

Fig. 5 is a cross section on the line 55 of Fig. 4:, showing the lever in its raised position.

Referring now more particularly to the characters of reference on the drawings, the machine comprises a horizontal frame structure consisting of side beams 1 with crosl beams 2 at its ends. J ournaled in and extending between the beams 1 intermediate their ends is a shaft 3. Turnable on the the wheels at their outer ends, these bands 3 being concentric with the tread, the same width as the spokes, and preferablybut not necessarilyformed integral therewith. Like wise extending between corresponding spokes of the wheels are plates 7 abutting against one edge face of the spokes and extending from the bands 6 toward the shaft 3 a certain distance. Each set of members 6 and 7 forms a scoop which is open rearwardly of the direction of movement of the wheel when at the bottom thereof. Fixed on the shaft 3 is a cylindrical bowl 8 cut away for its full width a certain distance above the shaft so as to be open on top. The bowl is is concentric with the shaft and with the wheels and extends closely between the spokes of the two wheels but with a working clearance therebetween. The inner ends of the scoop plates 7 clear the periphery of the bowl just sufficiently to prevent any possibility of engaging the same.

Disposed under the frame rear-wardly of the wheels is a transverse scraper blade 9 set at a suitable vertical angle and supported from the frame by'bars 10 which extend from said blade to the ends of the shaft 3 outside the beams 1, the bars being turnable' on the shaft. The scraper blade is disposed relative to the wheels and scoops so that with the forward movement of the machine andthe rotation of the wheels, only a small mass of dirt will be scraped and piled in front of the blade before the forward portion of such dirt will be successively engaged by the rotating scoops which immediately raise'the dirt and deposit it in the bowl. The bowl is therefore being concentrally of its width. This lever passes between longitudinally extending guide plates 12 fixed on the rear beam 2. Hinged onto the plates at their forward ends and on top are transversely opposed catch plates 13, yieldable upwardly, whose free ends normally lie in adjacent relationship to each other as shown inFig. 4. This lever carries a forwardly projecting pi'n or bar 1 1 above the guide structure which is. adapted,- when. the lever is moved forwardly so as to project between the plates 13, to then project into the path of movement of the scoop members 6. (hen the lever-pin is thus engaged with any member 6 the rotation of the.

wheels causes the pin and lever to be raised until the diverging path of movement of the members (3 relative to the lever causes the pin to be released. The lever; is then held from dropping by an adjustable block- 15 thereon This block issnormally below theplates 13, butwith the upward move ment of the lever it will spread and lift the plates and pass above the same. Then when thepin let is releasedthe block 15 acts as a stop, in connection with said catch plates, to prevent downward movement of the lever, as shown in Fig. 5.

, therefore be held raised. When it is desired till to lower the blade it is only necessary to pull the lever rearwardly to clear the plates 13, the latter terminating a sullicient dis tance ahead of the beam 2 to permit of the unobstructed passage of the lever and block between the guides rearwardly of said plates. i

To enable the bowl to dumpit must be tipped upside down or turned through a half. revolution of the shaft. Thismay be done in various ways, either by hand or power. In the present instance I have shown a power actuated mechanism com.- prising alever 16 secured to the shaft 3 and rotated between a beam- 1 and the adjacent wheel. The lever normally extends rearwardly to a point adjacent the beamfl, so that its corresponding end may be manipulated by hand, and has a lateral pin 17 extending toward the wheel to project into the path oi. movement ofthe spokes 5. The. pin only thus projects however when the lever (which is of spring material and transversely yieldable) is sprung inwardly and. clear of a catch plate 18 mounted on the beam 1. The lever is held in that position until a spoke engages the pin, when said lever will of course be rotated by the continued rotation ofthe spoke. The lever and bowl being both secured to the shaft, said bowlis then arranged in driving relation with the wheel and will of course rotate therewith. As the bowl approaches an upset position the lever 16 engages a sloping release member 19 or cam fixed on the forward beam 2.

This member is arranged to cause the adj a- The scraping blade will.

rection to return. it to engagement with the catch member h j When the bowl is discharged some offthe dirt2will fall on the buckets underneath. and. will be raisedihagain as the wheels. rotate. Such dirt, however, will then drop onto the inverted and downwardly sloping surface of the bowl and will. slide touthe ground instead of, falling into thehowl. Thus? after about two revolutions of the wheels all the.

dirt will be taken. care. of and. properly. discharged clear otthe machine. I j e The majority of the wheel spokes arev referably riveted to the wheel treads" and Some of the spokes, however, may bebolted".

to the treads and hubs so that they maybe removed therefrom with the corresponding scoop members as a unit- This will" permit the bowl to be inserted andwi'thdrawn from between the wheels. when assembling the mach ne or when deslrmg to dismount the bowl for repairs or replacement.

The cross members 6 between the wheels. not only form. the bottoms of the. scoops, but i also serve. to support theweight ofthe ma; chine in. addition to thewheeltreadsr is especially valuable in maantaining themachine on the surface when. workin .,in.

sand and loose dirt, giving a caterpillar. tread effect. e e j j A. further object of the invention is to produce a simpleand inexpensivedevice and.

yet one which will be exceedingly effective for thepurpose for which. it designed... Q

While this specification sets forth in do.- tail the present and. preferred construction. of the device, still in practice suchdeviations from such detail maybe resorted; to as do not formv a departure from thespiirit of invention, as defined by the appended claims..- Ha-ving thus described. my invention what I claim as new and useful and. desire toso.- cure by Letters Patentis i 3 v 1. A scraper including a frame, a wheel structure supporting the same, atransversei scraper blade behind the wheel structure, a

net

the projections clear each other, and means then acting automatically to prevent lowering movement of the lever.

2. A scraper including a frame, a wheel structure supporting the same,a transverse scraper blade behind the wheel structure, a connection between the blade and frame pivotally connected to the latter, an upstanding lever connected to the blade, means operable at will between the lever and wheel structure for causing the lever to be raised a certain distance with the forward rotation of the wheel, a guide through which the lever passes, an enlargement on the lever, and an upwardly yielding .plate on the guide, normally engaging the lever, the block being disposed on the lever so that it will move above the plate when the lever has been raised said certain distance.

3. A scraper including a frame, wheels supporting the same, a bowl turnably hung in the frame, a lever mounted in fixed and radial connection with the bowl to turn therewith, means normally holding the lever against movement, means for placing the lever into driving engagement with one of the wheels when the lever is released from the holding means whereby the bowl will rotate with the wheel, and means on the frame to engage the lever when the latter has rotated with the wheel to a bowl-upsetting position and move said lever out of driving engagement with the wheel.

4., A scraper including a frame, wheels supporting the same, a bowl turnably hung in the frame, a lever mounted in fixed and radial connection with the bowl to turn therewith, means normally holding the lever against movement, means for placing the lever into driving engagement with one of the wheels when the lever is released from the holding means whereby the bowl will rotate with the wheel, and a common means on the frame for moving the lever out of driving engagement with the wheel after the lever and bowl have moved to a bowlupsetting position and for also holding said lever against further movement in the same direction.

5. A scraper including a frame, a transverse shaft turnably mounted thereon, a bowl fixed on the shaft, wheels turnable on the shaft, spokes for the wheels, a transversely flexible lever fixed on the shaft and projecting radially therefrom, a stop on the frame normally engaging the lever to prevent turning movement thereof, a pin projecting laterally from the'lever for engagement with a spoke of one of the wheels when said lever is flexed transversely and clear of the stop, and a cam mounted on the frame in the path of rotative movement of the lever to engage and draw the same laterally so that the pin is disengaged from the spoke, after said lever has rotated to an arcuate extent sufficient to place the bowl in an inverted position.

In testimony whereof I afiix my signature- FRANK C. MoINTIRE. 

